Door stop



FIG. 1 is a perspective view of a door stop showing our new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a left side elevation view thereof; and,

FIG. 7 is a right side elevation view thereof.

The broken lines indicate portions of the door stop that form no part of the claimed design. 

CLAIM The ornamental design for a door stop, as shown and described. 